A trait that varies continuously is likely to be affected by ________
a. one gene as well as the environment
b. multiple genes but not the environment
c. multiple genes as well as the environment
d. one gene but not the environment
c
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The production of a functional gene product by transforming bacteria that lack a lacZ gene with a plasmid containing a lacZ gene is known as
A) complementation. B) mitosis. C) transfection. D) reversion.
One drawback associated with the fluorochrome stain method for detecting Mycobacterium is that:
a. it is less sensitive than the conventional carbolfuchsin stains. b. it requires the smear to be initially ex-amined at lower magnifications. c. many rapid-growers may not appear fluo-rescent with these reagents. d. it increases the amount of time needed for examining smears.
The transition of the early earth’s atmosphere from
one rich in hydrogen to one rich in oxygen may be attributed to a. photosystem II. b. photosystem I. c. the cyclic pathway of photosynthesis. d. the light-independent reactions. e. the activity of the electron transfer chain.
The study of chromosomal variation is important because these variations in chromosome structure and number can have major effects on the characteristics of an organism. Also, these changes have been an important force in the ___________ of new species.
Fill in the blank(s) with the appropriate word(s).